Ross Valley Sanitary reports San Anselmo sewage spill

The Ross Valley Sanitary District has reported a spill of at least 10,000 gallons of sewage in San Anselmo.

The spill occurred during Sunday's rainstorm. Other sewage spills in Marin have occurred during periods of heavy rain, when stormwater runoff has inundated sewage systems.

On Sunday, Ross Valley district workers spotted an overflowing manhole at 16 Broadmoor Drive at about 7:55 a.m. The district reported that the blockage was cleared before 10:30 a.m. that same day. Workers were assisted by San Anselmo public works employees and Twin Cities and San Anselmo police departments.

Warning signs have been posted in the affected area. The cause of the overflow was still under investigation.